class Settings:
    """存储游戏中所有设置的类"""
    def __init__(self):
        # 屏幕大小
        self.screen_width = 900
        self.screen_height = 600
        # 屏幕背景颜色
        self.bg_color = (230,230,230)

        # 火箭速度设置
        self.rocket_speed = 2